Hunter Mahan reacts after he chipped in for a birdie to win the hole on the 12th hole during the semifinal round of the World Golf Championships - Accenture Match Play at the Golf Club at Dove Mountain on February 24, 2013 in Marana, Arizona.

Hunter Mahan reacts after he chipped in for a birdie to win the hole on the 12th hole during the semifinal round of the World Golf Championships - Accenture Match Play at the Golf Club at Dove Mountain on February 24, 2013 in Marana, Arizona.

Hunter Mahan reacts after he chipped in for a birdie to win the hole on the 12th hole during the semifinal round of the World Golf Championships - Accenture Match Play at the Golf Club at Dove Mountain on February 24, 2013 in Marana, Arizona.

Hunter Mahan reacts after he chipped in for a birdie to win the hole on the 12th hole during the semifinal round of the World Golf Championships - Accenture Match Play at the Golf Club at Dove Mountain on February 24, 2013 in Marana, Arizona.